It's easier said than done in the heat of a bidding war, but people should buy the book, not the label. (I may disown that comment should I ever try to sell an overgraded book .) The Vancouver Namora #1 might be the most desirable book in the collection (maybe not, considering how high the Ellery Queen went this year), but it shouldn't have been slabbed as a 9.8. It sold for $13,800 in 2006 because somebody bid on the label, but then it sold for $7,767.50 in 2009—a year when comics sold very well, generally—probably because the bidders actually looked at the book, which should not have been graded higher than 9.4.
http://comics.ha.com/itm/golden-age-1938-1955-/namora-1-vancouver-pedigree-timely-1948-cgc-nm-mt-98-white-pages/a/7002-91179.s
The Mile High Pep 53 was slabbed as a 9.6 despite significant staple stress, a dull lower left corner, and a what looks like ding on the upper corner. I'd have called it a 9.2.
http://comics.ha.com/itm/golden-age-1938-1955-/pep-comics-53-mile-high-pedigree-mlj-1945-cgc-nm-96-white-pages/a/7007-91192.s#Photo